Neon vs Sodium
Side-by-side comparison of Neon (Ne, element 10) and Sodium (Na, element 11) by atomic structure and physical properties.
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| Atomic number | 10 | 11 |
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| Symbol | Ne | Na |
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| Name | Neon | Sodium |
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| Category | noble-gas | alkali-metal |
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| Standard Atomic Weight | 20.1797 u | 22.989769 u |
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| Period | 2 | 3 |
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| Group | 18 | 1 |
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| Block | p | s |
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| Phase at STP | Gas | Solid |
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| Electron configuration | [He]2s22p6 | [Ne]3s1 |
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| Oxidation states | [0] | [-1, 0, 1] |
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| Electronegativity (Pauling) | N/A | 0.93 |
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| Electron affinity | -1.2 eV | 0.5479 eV |
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| Density | 0.8999 kg/m³ | 970 kg/m³ |
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| Melting point | -248.59 °C | 97.8 °C |
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| Boiling point | -246.05 °C | 882.85 °C |
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| Discovery year | 1898 | 1807 |
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Key Differences
| Ne Neon | Na Sodium |
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| Standard Atomic Weight | 20.1797 u ↓ lower | 22.989769 u ↑ higher |
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| Density | 0.8999 kg/m³ ↓ lower | 970 kg/m³ ↑ higher |
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| Melting point | -248.59 °C ↓ lower | 97.8 °C ↑ higher |
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| Boiling point | -246.05 °C ↓ lower | 882.85 °C ↑ higher |
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| Electron affinity | -1.2 eV ↓ lower | 0.5479 eV ↑ higher |
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| Period | 2 | 3 |
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| Group | 18 | 1 |
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| Block | p | s |
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| Category | noble-gas | alkali-metal |
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| Phase at STP | Gas | Solid |
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| Electron configuration | [He]2s22p6 | [Ne]3s1 |
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| Discovery year | 1898 | 1807 |
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